CA1311150C - Piercing projectiles - Google Patents
Piercing projectilesInfo
- Publication number
- CA1311150C CA1311150C CA000567840A CA567840A CA1311150C CA 1311150 C CA1311150 C CA 1311150C CA 000567840 A CA000567840 A CA 000567840A CA 567840 A CA567840 A CA 567840A CA 1311150 C CA1311150 C CA 1311150C
- Authority
- CA
- Canada
- Prior art keywords
- projectile
- bore
- central core
- rifled
- auxiliary
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000002360 explosive Substances 0.000 claims abstract description 14
- 230000001141 propulsive effect Effects 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 2
- 239000007779 soft material Substances 0.000 claims 2
- 230000003247 decreasing effect Effects 0.000 claims 1
- 230000001960 triggered effect Effects 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 239000011797 cavity material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 230000001066 destructive effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 1
- 239000002674 ointment Substances 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- 230000000135 prohibitive effect Effects 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
- F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
- F42B12/04—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type
- F42B12/10—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type with shaped or hollow charge
- F42B12/16—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type with shaped or hollow charge in combination with an additional projectile or charge, acting successively on the target
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
- F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
- F42B12/36—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information
- F42B12/44—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information of incendiary type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
- F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
- F42B12/04—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type
- F42B12/06—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type with hard or heavy core; Kinetic energy penetrators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
- F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
- F42B12/36—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information
- F42B12/56—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information for dispensing discrete solid bodies
- F42B12/58—Cluster or cargo ammunition, i.e. projectiles containing one or more submissiles
- F42B12/62—Cluster or cargo ammunition, i.e. projectiles containing one or more submissiles the submissiles being ejected parallel to the longitudinal axis of the projectile
- F42B12/625—Cluster or cargo ammunition, i.e. projectiles containing one or more submissiles the submissiles being ejected parallel to the longitudinal axis of the projectile a single submissile arranged in a carrier missile for being launched or accelerated coaxially; Coaxial tandem arrangement of missiles which are active in the target one after the other
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
- Portable Nailing Machines And Staplers (AREA)
- Toys (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A piercing projectile is disclosed, which comprises a main projectile matching the caliber of the weapon and in which is provided at least one axial bore opening towards the front. An auxiliary projectile is housed in the bore. Matching the caliber of the bore, a propulsive charge is placed between the bottom of this bore and the auxiliary projectile. A triggering device is used to ignite the propulsive charge in order to cause the auxiliary projectile to be fired before or at the time of the impact of the main projectile on its target. An explosive and/or incendiary charge is located in the main projectile ahead of the auxiliary projectile before it is fired and means for igniting this charge are provided and designed to be triggered automatically immediately the auxiliary projectile has been fired.
A piercing projectile is disclosed, which comprises a main projectile matching the caliber of the weapon and in which is provided at least one axial bore opening towards the front. An auxiliary projectile is housed in the bore. Matching the caliber of the bore, a propulsive charge is placed between the bottom of this bore and the auxiliary projectile. A triggering device is used to ignite the propulsive charge in order to cause the auxiliary projectile to be fired before or at the time of the impact of the main projectile on its target. An explosive and/or incendiary charge is located in the main projectile ahead of the auxiliary projectile before it is fired and means for igniting this charge are provided and designed to be triggered automatically immediately the auxiliary projectile has been fired.
Description
~ 3 ~
IMPROVEMENTS TO PIERCIN~; PROJEC~ILES
The invention relates to piercing projectile~ and comprises a main projectile haviny -the caliber o-E the weapon and in which is provided at least one axial bore -that opens towards -the front and, housed in said bore, an auxiliary projectile having the caliber of said bore, a propulsive charge being placed between the bo-ttom of this bore and said auxiliary projectile.
A triggering device is provided -to igni-te the propulsive charge in order -to cause the auxiliary projectile to be Eired before or at the -time oE impac-t of the main projectile on its targe-t.
Such piercing projectiles, whose piercing effect is thus brought abou-t, on -the one hand, by the auxiliary projec-tile and, on the other hand, by the main projec-tile, are known in the art.
The object of the presen-t inventioen is to confer on piercing projectiles of -the above mentioned type additional destructive properties, par-ticularly as regards explosives and/or incendiary effects.
For this purpose, the invention proposes to locate at leas-t one explosive and/or incendiary charge in the main projectile ahead of the auxiliary projectile before it is fired, means for igniting this explosive and/or incendiary charge being provided and arranged so as to be triggered automatically immediately the auxiliary pro-Jectile has been fired.
The invention as claimed hereinafter is thus concerned with a piercing projectile having a longitudinal axis oE symme-try and intended to be fired by a weapon having a rifled barrel, said piercing projectile comprisi.ng:
a main piercing projectile ma-tching the caliber of the rifled barrel, said main piercing projectile having a rear $ ~
~L 3 ~
- la -shoe and a central core, said rear shoe being made of a rela-tively sof-t material Eor engagemen-t with the rifling of the barrel and having an outside diamete:r such that it engages the rifling of -the rifled barrel, said central core being made of a relatively hard material compared with that of said rear shoe and having an outside diameter such that it does not engage -the rifling of -the riEled barrel, a self-tightening conical sleeve coupling means for securing said rear shoe and said central core -toge-ther;
a single axially ri.~led bore providecl coaxially wi-th the longitudinal symmetry axis in said cen-tral core and opening towards a Eront oE said cen-tral core, the rifling o~
said ax.ial rifled bore being in the same ro-tational direction as the riEling of the rifled barrel an auxiliary piercing projec-tile housed, in said rifled bore and matching -the caliber of said rifled bore, said auxiliary piercing projec-tile being arranged to engage the rifling of said rifled bore;
a propulsion charge placed between a bottom of said rifled bore and said auxiliary projectile;
a proximi-ty detonating fuse which is detonated when said piercing projec-tile is reaching a target;
a -triggering means which is actuated by said proximity detonating fuse for igniting said propulsive charge to cause said auxiliary projectile to be fired;
at leas-t one secondary charge located in said central core; and 3~ an ignition means provided between said r.ifled bore and said secondary charge for, when said auxiliary piercing projec-tile a~-ter being f.ired passes in Eront of said ignition means, automatically igniting said secondary charge.
~3 :~ 3 ~
- ]b -As can be understood, the means for igniting the explosive and~or incendiary charge are sensitive -to the passage of the auxiliary projectile through -the axial bore provided in the ma:Ln projectile.
Such igniting means can then take the form of a-t least one channel placing the axial bore provided in the main projectile in communication with the explosive and/or incendiary charge.
/
~ 13~
is such that the angular velocity generated on the au~iliary projectile is added to tha~ imparted to said auxiliary projec-tile by the main projectile.
S~ructurally speaking, i-t is advantageous to provide securing means to make the auxiliary pro~ectile before it is fired, integral in rotation with -the main projectile; such securing means can take the form of a self clamping tapered sleeve.
This self-clampin~ tapered sleeve between the auxiliary projectile and -the main projectile also serves as a means for temporarily retaining the auxiliary projectile in the axial bore and makes it possible to optimize the manner in which the auxiliary projectile gains speed (axial velocity and speed of rotation) when the propulsive charge is ignited.
Apart fr~m the arrangements just discussed, the invention consists of a number of means which are prefera~ly used at the same time and which will be described in greater de~ail below.
The invention can be readily understood, in any case, with reference to the description which follows as well as the annexed drawing, both of which relate to a preferred and, of course, non limitative embodiment of the invention.
Fig. 1 of this drawing is an axial cross section of a projectile according to the invention.
Fig. 2 is a cross section along line II-II of Fig. 1.
The piercing projectile according to the invention, can be produced in calibers such as 12.7 mm (.50) which is -the one used in most machine guns currently in service.
However, it is perfectly possible to contemplate applying the invention to other calibers, in particular: 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm or even larger calibers.
The piercing projectile comprises:
3 ~3~ 5~
- a main projectile 1 at leas-t partially made of hard ma-terial (steel), this main projec-tile matching the caliber of the weapon, an a~ial bore 2 opening to-wards the front being provided in this main projectile, coaxially with its axis of axial symmetry, - and, housed 1~ this axial bore 2, an auxil-iary projec~ile 3 essentially made of a hard material (steel), this auxiliary projectile matching the caliber of said bore 2, a propulsive charge 4 being placed be-tween the bottom of this bore and said auxiliaryprojectile.
A triggering device, generally iden-tified by reference number 5 which will be described in greater detail below, is provided to ignite the propulsive charge 4 in order to cause auxiliary projectile 3 to be fired before or at the time of impac-t of the main projectile 1 on its target.
In one advantageous embodiment of thi~ main projectile 1, it is ormed of several parts, namely:
- a central core 6 made of a hard material (steel), or a material tha-t is both hard and heavy (tung-sten), this central core comprising a rear portion 6a having the shape of a truncated cone whose diameter de-creases rearwards and a front portion 6b having the shape of a truncated cone whose diameter decreases forwards, - a rear shoe 7 made of a material less hard than steel (brass) and having a frustroconical bore 7a suitable for fitting over the frustroconical rear portion 6a of the central core 6, this rear s~oe 7 comprising an . 30 area in the shape of an annular bulge 7b -the outside dia-meter of which is such that it engages with the rifling of the gun from which the projectile according to the invention is fired, - a front cap 8 made of a material less hard than steel (brass) and having a frus-troconical bore 8a, suitable for fitting over the frustroconical front portion 6b of the central core 6, this front cap 8 ~ 3 ~
comprising an area in the form of an annular bulge 8a whose outside diameter is such as to cooperate with the rifling of the gun from which the projectile according -to the invention is fired.
The above mentioned rear shoe 7 and the above-mentioned front cap 8 are interconnected at a plane of junction P, the outside diameter of the pro~ectile according to the invention at this plane of ~unction P
being less than the outsi.de diameter of rear shoe 7 in the region of its area in the for~ of an annular bulge 7b and less than the outside diameter of front cap 8 in the region of its area in the form of an annular bulge 8b, in proportions such that the hollow li.nking the two above mentioned areas in the form of annular bulges is no-t in contact with th~ gun from which ~he pro~ectile according to the invention is fired.
The axial bore 2 of such a projectile is thus provided in central GOre 6 at the front of which there is a mouth 9 covered by the poin~ 10 of front cap 8 which is thin in the area of this mouth 9.
To confer des-tructive properties upon such a projectile, particularly as regards explosiv~ and/or incendiary effects, main projectile 1 comprises one or preferahly several explosive and/or incend.iary charges 11 located in the main projectile 1, forward of auxiliary projectile 3 before it is fired, means for igniting this explosive and/or incendiary charge 11, generally identified by reference 12 being provided and arranged so as to be triggered automatically immediately auxiliary projec-~ile 3 has been fired.
It is advantageous to arrange these explosive and/or incendiary charges 11 between central core 6 and front cap 8.
For this purpose there are provided by cavities 13 circumferentially spaced at regular intervals and provided in central core 6, each of these cavi-ties 13 containing an explosive and/or incendiary substance and ~31~
being closed by the inner wall of fron~ cap 8.
It is an advantage for the means 12 for igniting these explosive and/or incendiary charges 11 to be designed so that they are sensitive to the passage of auxiliary projectile 3 through bora 2.
In this case, there is provided at least one channel 14 placing axial bore 2 in communication with each explosive and/or incendiary charge 11 housed in lts cavity 13.
The igniting of propulsive charge 4 causes auxiliary projectile 3 to be fired and, immediately this auxiliary projectile 3 has passe~ the outlets o ~hannels 14 into bore 2, the hot gases penetrate into channels 14 and ignite the explosive and/or incendiary charges ~oused in cavities 13.
Axial bore 2 can comprise riflings 15 the pitch of which is such that ~he angular velocity generated on auxiliary projectile 3 is added to the angular velocity imparted by main projectile 1 to said auxiliary projectile 3.
It is an advantage to provide securing means to make auxiliary projectile 3, before it is fired, integral in rotation with central core 6 o~ main pro~ectile 1;
such means a~e formed by a self-clamping tapered sleeve 16 between the rear portion of auxiliary projectile 3 and the bottom of axial bore 2 said means being provided in the central core 6.
This self clarnping tapered sleeve 16 between auxiliary projectile 3 and central core 6 also serves as a means of temporarily retaining auxiliary projectile 3 in axial bore 2 and makes it possible to optimi~.e the gain in speed of auxiliary projectile 3 (axial velocity and rotational velocity) when the propulsive charge is ignited.
To increase the volume of propulsive charge 4, it may be an advantage to provide an area 2a of enlarged diameter at -the bottom of axial bore 2.
The triggering device 5 provided for the purpose of i~niting propulsive charge ~ in order to cause auxiliary projectile 3 to be fired can comprise:
- a proximi~y de~onating fuse 17 placed at the front of the projectile, for example between the point 10 of the front cap 8 and mouth 9 via which axial bore 2 emerges from central core 6, - and one ,or preferably several, conduits 18, containing a pyrotechnical subs-tance and linking up this proximity detonating fuse with propulsive charge 4;
- these conduits 18 can be provided between central core 6, on the one hand, and rear shoe 7 and front cap 8, on the other hand.
Structurally speaking, it can be seen that a projectile according ko the invention can be made in all calibers.
However, it will be appreciated that the smaller the caliber the greater the dlfficulty in producing it.
20It is thus reasonable to assume that, to achieve a level of production compatible with large scale manufacturing criteria a~ non prohibitive costs, any caliber of less than 12.7 mm ~.50), -without being excluded from the field of application of the invention, can be discarded at least in the initial stage.
In the case of caliber 12.7 mm, (.50), it is possible to adopt an embodiment similar to that illustrated in the annexed drawing: the same would also apply to a caliber of 15 mm.
30As to larger calibers 20,mm, 25 mm, 30 mm, 35 mm, 40 mm, 50 mm and above, the architecture of the projectile according to the invention could be more freely designed given the dimensions that the componen-ts of the projectile could then have.
35As it goes without saying and as is apparent from -the preceding description, khe invention is in no way limited to those of its modes of application and ~3~ 1~5~
embodiments that have been more particularly contemplated, it embraces on the contrary, all possible variations thereof.
IMPROVEMENTS TO PIERCIN~; PROJEC~ILES
The invention relates to piercing projectile~ and comprises a main projectile haviny -the caliber o-E the weapon and in which is provided at least one axial bore -that opens towards -the front and, housed in said bore, an auxiliary projectile having the caliber of said bore, a propulsive charge being placed between the bo-ttom of this bore and said auxiliary projectile.
A triggering device is provided -to igni-te the propulsive charge in order -to cause the auxiliary projectile to be Eired before or at the -time oE impac-t of the main projectile on its targe-t.
Such piercing projectiles, whose piercing effect is thus brought abou-t, on -the one hand, by the auxiliary projec-tile and, on the other hand, by the main projec-tile, are known in the art.
The object of the presen-t inventioen is to confer on piercing projectiles of -the above mentioned type additional destructive properties, par-ticularly as regards explosives and/or incendiary effects.
For this purpose, the invention proposes to locate at leas-t one explosive and/or incendiary charge in the main projectile ahead of the auxiliary projectile before it is fired, means for igniting this explosive and/or incendiary charge being provided and arranged so as to be triggered automatically immediately the auxiliary pro-Jectile has been fired.
The invention as claimed hereinafter is thus concerned with a piercing projectile having a longitudinal axis oE symme-try and intended to be fired by a weapon having a rifled barrel, said piercing projectile comprisi.ng:
a main piercing projectile ma-tching the caliber of the rifled barrel, said main piercing projectile having a rear $ ~
~L 3 ~
- la -shoe and a central core, said rear shoe being made of a rela-tively sof-t material Eor engagemen-t with the rifling of the barrel and having an outside diamete:r such that it engages the rifling of -the rifled barrel, said central core being made of a relatively hard material compared with that of said rear shoe and having an outside diameter such that it does not engage -the rifling of -the riEled barrel, a self-tightening conical sleeve coupling means for securing said rear shoe and said central core -toge-ther;
a single axially ri.~led bore providecl coaxially wi-th the longitudinal symmetry axis in said cen-tral core and opening towards a Eront oE said cen-tral core, the rifling o~
said ax.ial rifled bore being in the same ro-tational direction as the riEling of the rifled barrel an auxiliary piercing projec-tile housed, in said rifled bore and matching -the caliber of said rifled bore, said auxiliary piercing projec-tile being arranged to engage the rifling of said rifled bore;
a propulsion charge placed between a bottom of said rifled bore and said auxiliary projectile;
a proximi-ty detonating fuse which is detonated when said piercing projec-tile is reaching a target;
a -triggering means which is actuated by said proximity detonating fuse for igniting said propulsive charge to cause said auxiliary projectile to be fired;
at leas-t one secondary charge located in said central core; and 3~ an ignition means provided between said r.ifled bore and said secondary charge for, when said auxiliary piercing projec-tile a~-ter being f.ired passes in Eront of said ignition means, automatically igniting said secondary charge.
~3 :~ 3 ~
- ]b -As can be understood, the means for igniting the explosive and~or incendiary charge are sensitive -to the passage of the auxiliary projectile through -the axial bore provided in the ma:Ln projectile.
Such igniting means can then take the form of a-t least one channel placing the axial bore provided in the main projectile in communication with the explosive and/or incendiary charge.
/
~ 13~
is such that the angular velocity generated on the au~iliary projectile is added to tha~ imparted to said auxiliary projec-tile by the main projectile.
S~ructurally speaking, i-t is advantageous to provide securing means to make the auxiliary pro~ectile before it is fired, integral in rotation with -the main projectile; such securing means can take the form of a self clamping tapered sleeve.
This self-clampin~ tapered sleeve between the auxiliary projectile and -the main projectile also serves as a means for temporarily retaining the auxiliary projectile in the axial bore and makes it possible to optimize the manner in which the auxiliary projectile gains speed (axial velocity and speed of rotation) when the propulsive charge is ignited.
Apart fr~m the arrangements just discussed, the invention consists of a number of means which are prefera~ly used at the same time and which will be described in greater de~ail below.
The invention can be readily understood, in any case, with reference to the description which follows as well as the annexed drawing, both of which relate to a preferred and, of course, non limitative embodiment of the invention.
Fig. 1 of this drawing is an axial cross section of a projectile according to the invention.
Fig. 2 is a cross section along line II-II of Fig. 1.
The piercing projectile according to the invention, can be produced in calibers such as 12.7 mm (.50) which is -the one used in most machine guns currently in service.
However, it is perfectly possible to contemplate applying the invention to other calibers, in particular: 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm or even larger calibers.
The piercing projectile comprises:
3 ~3~ 5~
- a main projectile 1 at leas-t partially made of hard ma-terial (steel), this main projec-tile matching the caliber of the weapon, an a~ial bore 2 opening to-wards the front being provided in this main projectile, coaxially with its axis of axial symmetry, - and, housed 1~ this axial bore 2, an auxil-iary projec~ile 3 essentially made of a hard material (steel), this auxiliary projectile matching the caliber of said bore 2, a propulsive charge 4 being placed be-tween the bottom of this bore and said auxiliaryprojectile.
A triggering device, generally iden-tified by reference number 5 which will be described in greater detail below, is provided to ignite the propulsive charge 4 in order to cause auxiliary projectile 3 to be fired before or at the time of impac-t of the main projectile 1 on its target.
In one advantageous embodiment of thi~ main projectile 1, it is ormed of several parts, namely:
- a central core 6 made of a hard material (steel), or a material tha-t is both hard and heavy (tung-sten), this central core comprising a rear portion 6a having the shape of a truncated cone whose diameter de-creases rearwards and a front portion 6b having the shape of a truncated cone whose diameter decreases forwards, - a rear shoe 7 made of a material less hard than steel (brass) and having a frustroconical bore 7a suitable for fitting over the frustroconical rear portion 6a of the central core 6, this rear s~oe 7 comprising an . 30 area in the shape of an annular bulge 7b -the outside dia-meter of which is such that it engages with the rifling of the gun from which the projectile according to the invention is fired, - a front cap 8 made of a material less hard than steel (brass) and having a frus-troconical bore 8a, suitable for fitting over the frustroconical front portion 6b of the central core 6, this front cap 8 ~ 3 ~
comprising an area in the form of an annular bulge 8a whose outside diameter is such as to cooperate with the rifling of the gun from which the projectile according -to the invention is fired.
The above mentioned rear shoe 7 and the above-mentioned front cap 8 are interconnected at a plane of junction P, the outside diameter of the pro~ectile according to the invention at this plane of ~unction P
being less than the outsi.de diameter of rear shoe 7 in the region of its area in the for~ of an annular bulge 7b and less than the outside diameter of front cap 8 in the region of its area in the form of an annular bulge 8b, in proportions such that the hollow li.nking the two above mentioned areas in the form of annular bulges is no-t in contact with th~ gun from which ~he pro~ectile according to the invention is fired.
The axial bore 2 of such a projectile is thus provided in central GOre 6 at the front of which there is a mouth 9 covered by the poin~ 10 of front cap 8 which is thin in the area of this mouth 9.
To confer des-tructive properties upon such a projectile, particularly as regards explosiv~ and/or incendiary effects, main projectile 1 comprises one or preferahly several explosive and/or incend.iary charges 11 located in the main projectile 1, forward of auxiliary projectile 3 before it is fired, means for igniting this explosive and/or incendiary charge 11, generally identified by reference 12 being provided and arranged so as to be triggered automatically immediately auxiliary projec-~ile 3 has been fired.
It is advantageous to arrange these explosive and/or incendiary charges 11 between central core 6 and front cap 8.
For this purpose there are provided by cavities 13 circumferentially spaced at regular intervals and provided in central core 6, each of these cavi-ties 13 containing an explosive and/or incendiary substance and ~31~
being closed by the inner wall of fron~ cap 8.
It is an advantage for the means 12 for igniting these explosive and/or incendiary charges 11 to be designed so that they are sensitive to the passage of auxiliary projectile 3 through bora 2.
In this case, there is provided at least one channel 14 placing axial bore 2 in communication with each explosive and/or incendiary charge 11 housed in lts cavity 13.
The igniting of propulsive charge 4 causes auxiliary projectile 3 to be fired and, immediately this auxiliary projectile 3 has passe~ the outlets o ~hannels 14 into bore 2, the hot gases penetrate into channels 14 and ignite the explosive and/or incendiary charges ~oused in cavities 13.
Axial bore 2 can comprise riflings 15 the pitch of which is such that ~he angular velocity generated on auxiliary projectile 3 is added to the angular velocity imparted by main projectile 1 to said auxiliary projectile 3.
It is an advantage to provide securing means to make auxiliary projectile 3, before it is fired, integral in rotation with central core 6 o~ main pro~ectile 1;
such means a~e formed by a self-clamping tapered sleeve 16 between the rear portion of auxiliary projectile 3 and the bottom of axial bore 2 said means being provided in the central core 6.
This self clarnping tapered sleeve 16 between auxiliary projectile 3 and central core 6 also serves as a means of temporarily retaining auxiliary projectile 3 in axial bore 2 and makes it possible to optimi~.e the gain in speed of auxiliary projectile 3 (axial velocity and rotational velocity) when the propulsive charge is ignited.
To increase the volume of propulsive charge 4, it may be an advantage to provide an area 2a of enlarged diameter at -the bottom of axial bore 2.
The triggering device 5 provided for the purpose of i~niting propulsive charge ~ in order to cause auxiliary projectile 3 to be fired can comprise:
- a proximi~y de~onating fuse 17 placed at the front of the projectile, for example between the point 10 of the front cap 8 and mouth 9 via which axial bore 2 emerges from central core 6, - and one ,or preferably several, conduits 18, containing a pyrotechnical subs-tance and linking up this proximity detonating fuse with propulsive charge 4;
- these conduits 18 can be provided between central core 6, on the one hand, and rear shoe 7 and front cap 8, on the other hand.
Structurally speaking, it can be seen that a projectile according ko the invention can be made in all calibers.
However, it will be appreciated that the smaller the caliber the greater the dlfficulty in producing it.
20It is thus reasonable to assume that, to achieve a level of production compatible with large scale manufacturing criteria a~ non prohibitive costs, any caliber of less than 12.7 mm ~.50), -without being excluded from the field of application of the invention, can be discarded at least in the initial stage.
In the case of caliber 12.7 mm, (.50), it is possible to adopt an embodiment similar to that illustrated in the annexed drawing: the same would also apply to a caliber of 15 mm.
30As to larger calibers 20,mm, 25 mm, 30 mm, 35 mm, 40 mm, 50 mm and above, the architecture of the projectile according to the invention could be more freely designed given the dimensions that the componen-ts of the projectile could then have.
35As it goes without saying and as is apparent from -the preceding description, khe invention is in no way limited to those of its modes of application and ~3~ 1~5~
embodiments that have been more particularly contemplated, it embraces on the contrary, all possible variations thereof.
Claims (6)
1. A piercing projectile having a longitudinal axis of symmetry and intended to be fired by a weapon having a rifled barrel, said piercing projectile comprising:
a main piercing projectile matching the caliber of the rifled barrel, said main piercing projectile having a rear shoe and a central core, said rear shoe being made of a relatively soft material for engagement with the rifling of the barrel and having an outside diameter such that it engages the rifling of the rifled barrel, said central core being made of a relatively hard material compared with that of said rear shoe and having an outside diameter such that it does not engage the rifling of the rifled barrel, a self-tightening conical sleeve coupling means for securing said rear shoe and said central core together:
a single axially rifled bore provided coaxially with the longitudinal symmetry axis in said central core and opening towards a front of said central core, the rifling of said axial rifled bore being in the same rotational direction as the rifling of the rifled barrel;
an auxiliary piercing projectile housed, in said rifled bore and matching the caliber of said rifled bore, said auxiliary piercing projectile being arranged to engage the rifling of said rifled bore;
a propulsion charge placed between a bottom of said rifled bore and said auxiliary projectile;
a proximity detonating fuse which is detonated when said piercing projectile is reaching a target;
a triggering means which is actuated by said proximity detonating fuse for igniting said propulsive charge to cause said auxiliary projectile to be fired;
at least one secondary charge located in said central core; and an ignition means provided between said rifled bore and said secondary charge for, when said auxiliary piercing projectile after being fired passes in front of said ignition means, automatically igniting said secondary charge.
a main piercing projectile matching the caliber of the rifled barrel, said main piercing projectile having a rear shoe and a central core, said rear shoe being made of a relatively soft material for engagement with the rifling of the barrel and having an outside diameter such that it engages the rifling of the rifled barrel, said central core being made of a relatively hard material compared with that of said rear shoe and having an outside diameter such that it does not engage the rifling of the rifled barrel, a self-tightening conical sleeve coupling means for securing said rear shoe and said central core together:
a single axially rifled bore provided coaxially with the longitudinal symmetry axis in said central core and opening towards a front of said central core, the rifling of said axial rifled bore being in the same rotational direction as the rifling of the rifled barrel;
an auxiliary piercing projectile housed, in said rifled bore and matching the caliber of said rifled bore, said auxiliary piercing projectile being arranged to engage the rifling of said rifled bore;
a propulsion charge placed between a bottom of said rifled bore and said auxiliary projectile;
a proximity detonating fuse which is detonated when said piercing projectile is reaching a target;
a triggering means which is actuated by said proximity detonating fuse for igniting said propulsive charge to cause said auxiliary projectile to be fired;
at least one secondary charge located in said central core; and an ignition means provided between said rifled bore and said secondary charge for, when said auxiliary piercing projectile after being fired passes in front of said ignition means, automatically igniting said secondary charge.
2. A piercing projectile according to claim 1, wherein the secondary charge is an explosive charge.
3. A piercing projectile according to claim 1 wherein the secondary charge is an incendiary charge.
4. A piercing projectile according to claim 1, 2 or 3, wherein said self-tightening conical sleeve coupling means comprises:
a frustoconical rear portion provided on said central core, said frustoconical rear portion having a diameter decreasing rearwards, and a frustoconical bore provided in said rear shoe, said frustoconical bore being suitable for fitting over the frustoconical rear portion of said central core.
a frustoconical rear portion provided on said central core, said frustoconical rear portion having a diameter decreasing rearwards, and a frustoconical bore provided in said rear shoe, said frustoconical bore being suitable for fitting over the frustoconical rear portion of said central core.
5. A piercing projectile according to claim 1, 2 or 3, wherein said central core comprises a frustoconical front portion whose diameter decreases forwards; and a front cap having a frustoconical bore provided for fitting over said front portion of said central core, said front cap being made of a relatively soft material for engagement with the rifling of the barrel, said front cap comprising an area in the form of an annular bulge the outside diameter of which is such that it engages the rifling of the rifled barrel.
6. A piercing projectile according to claim 1, 2 or 3, wherein said ignition means comprises at least one channel provided in said central core for placing said rifled bore in communication with secondary charge.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8707487 | 1987-05-27 | ||
| FR8707487A FR2615937B1 (en) | 1987-05-27 | 1987-05-27 | IMPROVEMENTS TO PERFORATING PROJECTILES |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1311150C true CA1311150C (en) | 1992-12-08 |
Family
ID=9351523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000567840A Expired - Lifetime CA1311150C (en) | 1987-05-27 | 1988-05-26 | Piercing projectiles |
Country Status (16)
| Country | Link |
|---|---|
| US (1) | US4932326A (en) |
| EP (1) | EP0293295B1 (en) |
| JP (1) | JPH0672759B2 (en) |
| KR (1) | KR890701982A (en) |
| CN (1) | CN1019143B (en) |
| AU (1) | AU596749B2 (en) |
| BR (1) | BR8807074A (en) |
| CA (1) | CA1311150C (en) |
| DE (1) | DE3860293D1 (en) |
| DK (1) | DK164527C (en) |
| ES (1) | ES2015612B3 (en) |
| FI (1) | FI890357A0 (en) |
| FR (1) | FR2615937B1 (en) |
| GR (1) | GR3000624T3 (en) |
| OA (1) | OA08977A (en) |
| WO (1) | WO1988009477A1 (en) |
Families Citing this family (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19535218C1 (en) * | 1995-09-22 | 1997-02-27 | Diehl Gmbh & Co | Ballistic projectile |
| DE19600167C1 (en) * | 1996-01-04 | 2003-07-17 | Diehl Stiftung & Co | Penetrator, used in explosive charge, comprises housing made from thin steel shell and heavy metal inner part containing charge and ignition system |
| US6408762B1 (en) | 1997-12-11 | 2002-06-25 | Lockheed Martin Corporation | Clamp assembly for shrouded aerial bomb |
| ES2226012T3 (en) * | 1997-12-11 | 2005-03-16 | Lockheed Martin Corporation | AIR PUMP PROVIDED WITH A COVER. |
| US6389977B1 (en) | 1997-12-11 | 2002-05-21 | Lockheed Martin Corporation | Shrouded aerial bomb |
| US6105505A (en) | 1998-06-17 | 2000-08-22 | Lockheed Martin Corporation | Hard target incendiary projectile |
| USD438930S1 (en) | 2000-02-09 | 2001-03-13 | Lockheed Martin | Shrouded aerial bomb |
| US6374744B1 (en) | 2000-05-25 | 2002-04-23 | Lockheed Martin Corporation | Shrouded bomb |
| ES2190317B1 (en) * | 2000-11-22 | 2004-11-16 | Candelaria Codoñer Gomez | IMPROVED PROJECT AGAINST DOUBLE BLINDS. |
| US8661980B1 (en) | 2003-05-08 | 2014-03-04 | Lone Star Ip Holdings, Lp | Weapon and weapon system employing the same |
| US7530315B2 (en) * | 2003-05-08 | 2009-05-12 | Lone Star Ip Holdings, Lp | Weapon and weapon system employing the same |
| FR2871226B1 (en) * | 2004-06-08 | 2006-08-18 | Tda Armements Sas Soc Par Acti | PROJECTILE, IN PARTICULAR ANTI-INFRASTRUCTURE PENETRATION BOMB AND METHOD OF PENETRATING SUCH A PROJECTILE THROUGH A WALL |
| US7895946B2 (en) | 2005-09-30 | 2011-03-01 | Lone Star Ip Holdings, Lp | Small smart weapon and weapon system employing the same |
| US7690304B2 (en) | 2005-09-30 | 2010-04-06 | Lone Star Ip Holdings, Lp | Small smart weapon and weapon system employing the same |
| US8541724B2 (en) | 2006-09-29 | 2013-09-24 | Lone Star Ip Holdings, Lp | Small smart weapon and weapon system employing the same |
| US8117955B2 (en) | 2006-10-26 | 2012-02-21 | Lone Star Ip Holdings, Lp | Weapon interface system and delivery platform employing the same |
| SE533168C2 (en) * | 2008-06-11 | 2010-07-13 | Norma Prec Ab | Firearm projectile |
| US9068803B2 (en) | 2011-04-19 | 2015-06-30 | Lone Star Ip Holdings, Lp | Weapon and weapon system employing the same |
| CN102654470A (en) * | 2012-04-19 | 2012-09-05 | 江苏亚洲气体设备有限公司 | Thermal-conductance dynamic reference gas analyzer |
| PL220109B1 (en) * | 2012-05-07 | 2015-08-31 | Jan Olszewski | Projectile for threaded weapon |
| US9389052B2 (en) * | 2013-09-18 | 2016-07-12 | The United States Of America As Represented By The Secretary Of The Army | Jacketed bullet |
| USD1055200S1 (en) | 2014-04-30 | 2024-12-24 | G9 Holdings, Llc | Projectile |
| DK3137843T3 (en) * | 2014-04-30 | 2019-08-26 | G9 Holdings Llc | PROJECTLY WITH IMPROVED BALLISTICS |
| AU2018276063B2 (en) * | 2017-05-30 | 2023-07-13 | Techventure Investments Pty Ltd | Single seal projectile |
| WO2019048914A1 (en) * | 2017-09-09 | 2019-03-14 | Ruag Ammotec Ag | FULL-COVER SECURITY FLOOR, ESPECIALLY FOR MULTIPURPOSE APPLICATIONS |
| CN110906806A (en) * | 2019-11-17 | 2020-03-24 | 长沙深蓝未来智能技术有限公司 | Outer trajectory end-segment bottom explosion speed-increasing penetration armor-piercing bullet |
| US11573068B1 (en) * | 2020-06-19 | 2023-02-07 | The United States Of America As Represented By The Secretary Of The Army | Payload protection and deployment mechanism |
| US11867487B1 (en) * | 2021-03-03 | 2024-01-09 | Wach Llc | System and method for aeronautical stabilization |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR477375A (en) * | 1900-01-01 | |||
| FR494445A (en) * | 1917-01-16 | |||
| FR864439A (en) * | 1939-12-12 | 1941-04-26 | Multiple directed rounds | |
| FR917369A (en) * | 1945-11-14 | 1947-01-06 | Special device for launching firearm projectiles | |
| LU44772A1 (en) * | 1963-11-07 | 1965-05-07 | ||
| US3418878A (en) * | 1967-06-02 | 1968-12-31 | James A. Stricklin | Method and means for augmenting hypervelocity flight |
| FR2202585A5 (en) * | 1972-10-10 | 1974-05-03 | France Etat | |
| DE2439304C2 (en) * | 1974-08-16 | 1986-02-27 | Mauser-Werke Oberndorf Gmbh, 7238 Oberndorf | Incendiary projectile, especially armor-piercing projectile |
| JPS51113400A (en) * | 1975-03-31 | 1976-10-06 | Tech Res & Dev Inst Of Japan Def Agency | Armored plate shooting bullet |
| NO137297C (en) * | 1976-07-01 | 1978-02-01 | Raufoss Ammunisjonsfabrikker | PROJECT. |
| DE2948542A1 (en) * | 1979-12-03 | 1984-04-12 | Rheinmetall GmbH, 4000 Düsseldorf | BULLET TO FIGHT MULTILAYERED, PREFERRED, ACTIVE ARMOR |
| US4648323A (en) * | 1980-03-06 | 1987-03-10 | Northrop Corporation | Fragmentation munition |
| PT77697B (en) * | 1982-11-24 | 1986-02-12 | Ladriere Serge | IMPROVED PROJECTILE FOR DISCHARGE BY FIREARMS |
| US4648324A (en) * | 1985-10-01 | 1987-03-10 | Olin Corporation | Projectile with enhanced target penetrating power |
-
1987
- 1987-05-27 FR FR8707487A patent/FR2615937B1/en not_active Expired
-
1988
- 1988-05-25 WO PCT/FR1988/000264 patent/WO1988009477A1/en not_active Ceased
- 1988-05-25 DE DE8888401272T patent/DE3860293D1/en not_active Expired - Lifetime
- 1988-05-25 BR BR888807074A patent/BR8807074A/en unknown
- 1988-05-25 ES ES88401272T patent/ES2015612B3/en not_active Expired - Lifetime
- 1988-05-25 KR KR1019890700145A patent/KR890701982A/en not_active Ceased
- 1988-05-25 EP EP88401272A patent/EP0293295B1/en not_active Expired - Lifetime
- 1988-05-25 AU AU19436/88A patent/AU596749B2/en not_active Ceased
- 1988-05-25 JP JP63504624A patent/JPH0672759B2/en not_active Expired - Lifetime
- 1988-05-26 CA CA000567840A patent/CA1311150C/en not_active Expired - Lifetime
- 1988-05-26 CN CN88103099A patent/CN1019143B/en not_active Expired
-
1989
- 1989-01-25 FI FI890357A patent/FI890357A0/en not_active IP Right Cessation
- 1989-01-25 OA OA59512A patent/OA08977A/en unknown
- 1989-01-26 DK DK033489A patent/DK164527C/en not_active IP Right Cessation
-
1990
- 1990-01-22 US US07/469,806 patent/US4932326A/en not_active Expired - Fee Related
- 1990-07-05 GR GR90400144T patent/GR3000624T3/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| US4932326A (en) | 1990-06-12 |
| CN1038157A (en) | 1989-12-20 |
| OA08977A (en) | 1990-11-30 |
| ES2015612B3 (en) | 1990-09-01 |
| DK164527B (en) | 1992-07-06 |
| GR3000624T3 (en) | 1991-09-27 |
| JPH0672759B2 (en) | 1994-09-14 |
| KR890701982A (en) | 1989-12-22 |
| CN1019143B (en) | 1992-11-18 |
| EP0293295A1 (en) | 1988-11-30 |
| DK33489A (en) | 1989-01-26 |
| BR8807074A (en) | 1989-10-31 |
| DK33489D0 (en) | 1989-01-26 |
| AU1943688A (en) | 1988-12-21 |
| AU596749B2 (en) | 1990-05-10 |
| EP0293295B1 (en) | 1990-07-04 |
| DE3860293D1 (en) | 1990-08-09 |
| DK164527C (en) | 1992-11-23 |
| WO1988009477A1 (en) | 1988-12-01 |
| FI890357A7 (en) | 1989-01-25 |
| JPH01503402A (en) | 1989-11-16 |
| FR2615937A1 (en) | 1988-12-02 |
| FR2615937B1 (en) | 1989-09-08 |
| FI890357A0 (en) | 1989-01-25 |
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| Date | Code | Title | Description |
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| MKLA | Lapsed |